Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
Left MCA: superior division infarct
|
This will affect the anterior mid-frontal gyrus, anterior to central sulcus
Right face and arm weakness Upper motor neuron (UMN) type Broca's aphasia / or nonfluent aphasia Right face and arm cortical type of sensory loss |
|
|
Left MCA: inferior division infarct
|
This will affect the areas posterior to the central sulcus
-Fluent or Wernicke's aphaisa -Occipital lobe is affected: visual field deficit - right face and arm sensory loss - may have right sided weakness (but motor deficits are less common) |
|
|
What type of stroke could result in Brocas (nonfluent) aphasia and which would result in Wernicke's aphasia (fluent)?
|
Broca's area is anterior sylvian fissure
Wernicke's area is posterior sylvian fissure Thus, superior MCA would affect the Brocas aswhere inferior MCA would affect Wernicke's area |
|
|
An infarct in the stem of the left MCA (entire) would result in what clinical features?
|
Right hemiplegia
Right hemianesthesia Global aphaisa Eye preference that drives eyes to contralateral side |
|
|
Right MCA: superior division infarct
|
Affects frontal lobe anterior to central sulcus
Left face and arm weakness left hemineglect may be present to variable extent |
|
|
Right MCA: inferior division infarct
|
Affects frontal and parietal lobes posterior to central sulcus and superior part of temporal lobe
profound left hemineglect left visual field and somatosensory |
|
|
In what area of the brain would you expect an infarct to cause language defects? what about neglect?
|
Language is primarily a left brain feature
the left sylvian fissure contains Broca's area (language production, more anterior) and Wernicke's area (understanding of speech, more posterior) Wernicke's lesion = receptive aphasia. Speech is normal sounding, they think they're talking normally. Broca's lesion = expressive aphasia (know what they want to say, but can't get it out) The right Parietal lobe is concerned with spatial processing. Thus a lesion causes by MCA infarct may result in left-hemineglect. |
|
|
Right MCA stem infarct
|
Left hemiplegia
Lefti hemianesthesia Left homonymous hemianopsia |
|
|
Left ACA infarct
|
Right leg weakness (UMN)
Right leg sensory loss Frontal lobe behavior abnormalities may have transcortical aphasia |
|
|
Right ACA
|
Left leg weakness
Left leg sensory loss frontal lobe behavior abnormalities partial left hemineglect |
|
|
Left PCA
|
Right homonymous hemianopia
Alexia without agraphia (if corpus callosum affected) large infarcts including thalamus and internal capsule can cause aphasia, right hemisensory loss, right hemiparesis |
|
|
Right PCA
|
Left homonymous hemianopia
larger infarcts can cause left hemisensory loss and left hemiparesis |
